@JohnH1 - It comes down to personal preference, however I can say that you will experience a significant increase in quality in every area of the S9 compared to the A3 with it being a recent flagship product. You might want to wait and check out the Unpacked Event on samsung.com tomorrow as Samsung are unveiling the next wave of phones, although the S9 is currently £549.00 on the official EShop which is pretty reasonable.